a clear space的用法和样例：
- There was a cleared space around the bar.
- Suddenly the dinghy shifted slightly, leaving a clear space above him.
- This type of infarction is marked by loss of neurons and neuroglial cells and the formation of a clear space at the center left.
- The sky was a clear blue over our heads.
- She retains a clear memory of his schooldays.
- There is a clear division of labor in ants.